在PHP/HTML中"post“方法后获取所选下拉列表的值

<form method="post" action="process.php">
  <select name="myDropdown">
    <option value="option1">Option 1</option>
    <option value="option2">Option 2</option>
    <option value="option3">Option 3</option>
  </select>
  <input type="submit" value="Submit">
</form>

<?php
$selectedOption = $_POST["myDropdown"];
echo "Selected option: " . $selectedOption;
?>